void SetView(UIView view, PageHandler control)
{
    view.AddSubview(control.ViewController?.View ?? throw new InvalidOperationException($"{nameof(control.ViewController.View)} cannot be null."));
    view.Bounds = new(0, 0, PreferredContentSize.Width, PreferredContentSize.Height);   // <= Here
    AddChildViewController(control.ViewController);

    if (VirtualView is not null)
    {
        this.SetBackgroundColor(VirtualView);
    }
}

public override void ViewWillTransitionToSize(CGSize toSize, IUIViewControllerTransitionCoordinator coordinator)
{
    coordinator.AnimateAlongsideTransition(_ =>
    {
        // Before screen rotate
        if (ViewController?.View is UIView view)
        {
            var overlayView = GetOverlayView(view);
            overlayView.Frame = new CGRect(0, 0, view.Frame.Width, view.Frame.Height);
        }
    }, _ =>
    {
        // After screen rotate
        if (VirtualView is not null)
        {
            PopupExtensions.SetSize(this, VirtualView);
            PopupExtensions.SetLayout(this, VirtualView);
        }
    });

    if (View is not null)
    {
        View.Bounds = new CGRect(0, 0, PreferredContentSize.Width, PreferredContentSize.Height);
    }

    base.ViewWillTransitionToSize(toSize, coordinator);
}